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Find the DZR_CBC Key

The DZR_CBC key is 16 Bytes long string used for track deciphering. You can find it like this:

• Browse the web deezer player
• Open the F12 debugger
• Go to the "source" panel
• Select the webworker source code
• pretty print the source using the {} icon
• search for 0x67] or [0x31 which are the start and end of the two half of the CBC key
• re-assemble the 16 bytes in this order:

[15, ... 3,1]
  ↓ ↖   ↖↓↖↓
[16, ... 4,2]

JS version if you are to lazy to reassemble by hand:

a=[97, ... 103]
b=[49, ... 52]
[].concat(...a.map((c,i)=>[a[i],b[i]]).reverse()).map(e=>String.fromCharCode(e)).join('')

• Add a new DZR_CBC environment variable in your .profile with the key value:

echo "export DZR_CBC=g4............a1" >> $HOME/.profile